Preheat the oven to 425 degrees F. Heat the olive oil in a large skillet set over medium heat. When the oil shimmers, add the onions and carrots and season with salt and pepper. Cook until softened, about 5 minutes. Add the sausage and garlic and cook until the sausage has browned all over, about 8-10 minutes.
Meanwhile, boil your gnocchi (recipe below!).
Drain the tomatoes reserving the juice.
Stir in all of the tomatoes, wine, and milk. Add the bay leaf and oregano and simmer the sauce for 15 minutes or until it has thickened slightly.
Stir in the gnocchi and reserved tomato juice. Bring the sauce to a boil and cook another 5-10 minutes. Remove from the heat and remove the bay leaf and oregano. Top the dish with cheese. Transfer to the oven and bake for 15 minutes or until the sauce is bubbling and the cheese has melted. Top with fresh basil.